belt buckle and shirt buttons on their uniform all form a straight line. But if a rule — even one as well known as the “gig line” — isn’t written down, is it even a rule? That was the ...

If the \(y\)-coordinates are the same, the equation of the line will be of the form \(y = …\). The equation of a straight line on a graph is made up of a \(y\) term, an \(x\) term and a number ...